package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.CategoryDTO;
import com.sky.dto.CategoryPageQueryDTO;
import com.sky.entity.Category;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.CategoryService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class CategoryServiceImpl implements CategoryService {

    @Autowired
    private CategoryMapper categoryMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;

    /**
     * 新增分类
     * @param categoryDTO
     */
    public void addCategory(CategoryDTO categoryDTO) {
        Category category = new Category();
        BeanUtils.copyProperties(categoryDTO,category);
        category.setStatus(StatusConstant.DISABLE);

        /*category.setCreateTime(LocalDateTime.now());
        category.setUpdateTime(LocalDateTime.now());
        category.setCreateUser(BaseContext.getCurrentId());
        category.setUpdateUser(BaseContext.getCurrentId());*/

        categoryMapper.addCategory(category);
    }


    /**
     *分类分页查询
     * @param categoryPageQueryDTO
     * @return
     */
    public PageResult pageQuery(CategoryPageQueryDTO categoryPageQueryDTO) {
        PageHelper.startPage(categoryPageQueryDTO.getPage(),categoryPageQueryDTO.getPageSize());

        Page<Category> page = categoryMapper.pageQuery(categoryPageQueryDTO);
        long total = page.getTotal();
        List<Category> records = page.getResult();
        return new PageResult(total,records);
    }

    /**
     * 修改分类
     * @param categoryDTO
     */
    public void updateCategory(CategoryDTO categoryDTO) {
        Category category = new Category();
        BeanUtils.copyProperties(categoryDTO,category);
       /* category.setUpdateTime(LocalDateTime.now());
        category.setUpdateUser(BaseContext.getCurrentId());*/

        categoryMapper.update(category);
    }

    /**
     * 启用、禁用分类
     * @param status
     * @param id
     */
    public void startOrStop(Integer status, long id) {
        Category category = new Category();
        category.setStatus(status);
        category.setId(id);

        /*category.setUpdateUser(BaseContext.getCurrentId());
        category.setUpdateTime(LocalDateTime.now());*/

        categoryMapper.update(category);
    }

    /**
     * 根据id删除分类
     * @param id
     */
    public void deleteCategory(long id) {
        //如果该分类关联了菜品，则不能删除
        Dish dish = new Dish();
        dish.setCategoryId(id);
        List<Dish> dishes = dishMapper.getBycategoryId(dish);
        if (dishes != null && dishes.size() > 0){
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
        }

        //如果该分类关联了套餐，则不能删除
        List<Setmeal> setmeals = setmealMapper.getByCategoryId(id);
        if (setmeals != null && setmeals.size() > 0){
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }

        categoryMapper.delete(id);
    }

    /**
     * 根据类型查询分类
     * @param type
     * @return
     */
    public List<Category> getByType(Integer type) {
        return categoryMapper.getByType(type);
    }
}
